I want to make sure there is not a scenario I have overlooked before I buy another radio. Recently when listening to talk radio, plosive sounds are completely cut out. The problem progressed when driving at night. When using the dash light dimmer, it seems the switch increases and decreases power to the radio. With no headlights on, it is hit or miss if the radio comes on at all. The last problem I had with the radio was fixed by unplugging the power source at the back of the radio and reinstalling. No luck with that this time around. Is the radio completely toast? Thanks.